Type-writing machine.



D. J. RICHARDSON. TYPE WRITING MACHINE.

APPLIUATION FILED DEC. 23, 1907.

1 1 3 95 3 Patented Jan. 9, 1912.

WITNESSES: N

1% AWN HIEATTURNEY DANIEL JUDSON RICHARDSON, oats-m me, nnw'ronx; nssrenon'ro THE more 1 rrrnwnrrnn comramr, or smousn, mew onx, a oonroaarron ornnw roan; l j

I Specification of letters Patent.

.rYrE-wmrnve momma I e Patented Ja 9,1912.

' Application'flled December 28, 1307. Serial No. 407,760.

Be a known that I, DANIEL Jonson RICH ARDSON, citizen of the United States, and

resident of Syracuse, in the county of Onon daga and State of New York, have invented certain new and useful Improvements in .Type-Writ-ingMachines, of which t-he following is a specification.- 1 My mventionrelates to typewri'ting machines and more particularly to means forindicating when the bottom edge of the sheet is being approached and for indicating how many lines remain to be written before the end of the page is reached; and one of the objects of said invention is to providesimple, cheap and eflicient means of the char: acter specified.

A furtherobject of the invention is to provide means such as those referred to which may be readily applied to variousstyles of typewriting machines without changing the v structural .featuresof said machines.

To the above and other ends which hereinafter appear, my invention consists of the features of construction, arrangements of parts and combinations of devices to be hereinafter described and partlcularly pointed out in the following claim.

In the drawings,.Figure 1 is a front elevation of-ap'laten and .parts ofla laten frame or carnage of my invention. ig. 2 is a transverse sectional view of the. same. Fig. 3 is a detached face view of the scale strip, shown flattened or straightened out. I i

p I have shown m invention m-the present usual manner by anti-friction instance 'embodie in a Monarch machine but it should be understood that the inven-' tion may be embodiedin various styles oftypewriting machines; a he carriage or platen framecom r1ses a slide and supporting baril supporte in the 'aring rollers or balls. End plates 2 project ,forwardly from the slide and supporting bar near-the ends thereof andhave bearing openings for a platen shaft 3 which supports a rotative latcn t. The left-hand platen head is ormed with'a line space ratchet wheel 5 with which theusualline spacin mechanism (not shown). coiiperates. rollers .6 (diagrammaticall shown in Fig. 2) are rovided at the si e of the platen where t e paper is introduced and forward feed rollers 7 are situated near the front of to'certain. parts of the machine.

elquipped with the evices ain feed' the platen-back of a laten scale supported on the carriage in t e usual manner. The parts thus far described are or may be of the usual construction embodied in the Monarch machine.

In order be convenientto assign definite dimensions will be supposed in the present instance that the platen 4 is 5% in circumference, that ing ratchet wheel 5, the teeth being situated about one-sixth ofan inch apart, and that to explain my inventionait Thus a point just above the platen scale; all-of the above being true of the construction embodied ordinarily in the. Monarch ma- ;6 approximately 'to the printing line or to 1 chine. This explanation is made since it will aid in an understanding of the invention,

though it should be understood that the roportlons specified may be varied accor ing vto circumstances.

A scale strip 9, showndetached in Fig. 3, consists of a band or strip of paper, celluloid, rubber or other suitable material longin the present instance. 'This scale strip is pasted or otherwise secured to the face of the platen, referably at one end thereof as shown in ig. 1, so as to-extend circum'ferentially around the platen to form. a;-circular scale. The scale is provided with two-sets of indices a and b arranged side by side, one set of indices a being numeric spaced a fullline space distance (one-third of an inch) apart, and the other set 6' com risin numeric indices 8 9 10,

' 11, '12, 13 spaced an inch a art, with intermediate marks to indicate ha f inches.

The-indices a are arrangedprogressively and so that when the platen 1s turned forwardly, the index numerals commencing.

with the'highest and ending with the lowest will be brought successively into register ....V.'e5-.' there are thirty-three teeth inthelme'spac- 7o fourteen teeth of the line space wheel to bring the paper from its'point' of intro 85] which corresponds in length to the circumference of the platen, the strip being 5%" at I ' 5 spond to the distance between two teeth of the line'spacing wheel and the index numerals a--should be spaced accordingly, care being exercised in applying the scale strip that one of the index numerals a appears just above the platen scale in' a line space position of the platen. -It requires in the present illustration a movement of two and one-third inches or seven full line spaces to -move any given point on the sheet from the feed roller 6 to the printing line or to a point just above the platen-scale so that the scale made up of theseven index numerals a, and about two inches in le th, is suflicient to bring said scale into new at about the time when the end of the sheet is disappearing behind the platen. In the present instance the first index numeral 7 of set a appears just to the right of and above the index numeral 11 of the other set I), whereas the last index numeral 1 of seta appears to the right of and abovethe I index numeral 9 of the other set, though this arrangementmay be varied according to circumstances as will hereinafter appear.

The set of indices 1) comprises the numer- LC 87 9,77 C 10, 11, C 7 1377[ which refer-to the'lengths of sheets of paper in Inches, the intermediate dash marks in dicating the half inches. This marking constitutes a linear scale of a length equal to the circumference of the platen employed, which, in the present instance, is five and one-half inches.

The index numerals 8 to 13 may be varied at will, though the marking shown 1s preferred'as it provides for the use of paper from 8 to 13% inches long, which covers the lengths of sheets ordinarily employed. With a platen of 51} inches in circum- 45 ference any desired variation within 5% inches in the length of the paper employed may be effected whether very short sheets or very long sheets are used, the scale being changed accordingly. Thus, if sheets from 15 to inches long are employed the scale marks 6 would be from 15 to 20 with the intermediate and additional dash marks to indicate the half inches.

In usin the invention as it is shown applied in t e present instance, let it be sup-' fore the platen has completed a rotation, however, the index numeral 7 of the set a will appear in register with the top platen scale and this will indicate to the operator that there are seven lines that may be written on-the sheet before the end is reached a and as each. additional line space is effected a. lower index numeral will appear in register with the scale until the numeral 1 is reached which indicates to the operator that only onemore line may be written. In a like manner if the sheet 11 inches long is employed the operator first sets the platen so that the index numeral 11 of set 6 appears in register with the indicator or platen scale as shown in Fig. 1 and then introduces and writes on the sheet as before. During the second revolution of the platen the index numerals a appear successively in register with the platen scale and indicate to the operator how many lines may be written before the end of the sheet is reached. I,

It is desirable in practice to leave a given extent oflower margin between the last line written and the bottom of the sheet which may be, say, one inch. According to the arrangement shown substantially this extent of margin will be provided. This margin may be increased or. decreased, however, by moving the set of indices a. up or down with reference to the;set of indices 12. If the indices a are brought farther down, less bottom margin-will be left, whereas if the indices a are moved farther me up on the scale strip more margin will be provided for.

It will be understood that I have pro- .vided two sets of indices which progress in the same direction and which are fixed 10E: relatively to each other and to the platen; that one set 6 determines the position to which the platen should be turned or adjusted to receive the paper; that the position to which the platen-is adjusted depends 11% onthe length of the sheet employed; and that an index b corresponding to the linear measurement of the sheet is brought into -register with the indicator or platen scale dicating indices a into use. It will also be understood that the indices a and b and the relation between them may be varied according to various circumstances; and that 126; I do not limit myself to the construction and arrangement shown as various changes may be rendered necessary by the style of the machine in which the Invention is embodied,

by the circumference of the platen, by the ex- 133 tent of bottom margin desired, by the extent of movement of the platen necessary tointroduce the sheet into the machine, and by the lengths of the sheets employed.- If a greater rangeof variation than that afforded by a 13K scale which corresponds in length to the cir cumference of theplaten is desired, the indices b may extend, around the platen more than a single turn; they may be spirally or and various modifications may be made without departing from the invention.

From the foregoing descriptionit will be seen that the invention is simple in construction, inexpensiveito manufacture, is eflicient in use and may be readily applied to existingforms of typewriting machines without changing the structural features of said machines. 7

What I claim as new and desire to secure I by Letters Patent, is:

In a typewriting machine, the'combina-- tion of a rotative platen, an index strip encircling the'platen and aflixed directly to the face thereof at one end, said strip having two sets of indices placed side by side and which extend around the platen, one set of indices being of linear measurement corresponding to the circumference'of the platen and the other set being numerical indices progressively: arranged and spaced apartac- I cording to t e line spacing of the machine,

- the extent of the last mentioned set of indices corresponding approximately to the extent of rotation of the platen required to feed a sheet from the point of introduction to the printing line, and an indicator 00- operating with both sets of indices.

Signed at-the cit of Washington, District of Columbia, t is 23rd day. of Decemher A. D. 1907.

Witnesses:

HENRY H. C. R.

NGELL, l' AN. 

